Narrative:

I was flying air carrier X on VNAV and LNAV descending and leveling off at 13000 ft. We were 20 mi west of clovis. I had the VNAV programmed for 20 west at 10000 ft and 250 KTS. I was calculating my arrival because center was keeping me slightly high. ZOA told the small transport to level at 12500 ft because of a traffic conflict. I was looking outside, below, and to the right because I knew we would be going 500 ft above him. TCASII showed: white then yellow, below and to the right, but still climbing. Almost immediately, TCASII went red with aural warning 'climb, climb.' the captain, who was monitoring TCASII, disengaged the autoplt and climbed to the left. TCASII said climb at 4000 FPM. The small transport passed to the right about 200 ft below and 1/2 - 1 mi away. Center gave us no instructions until we advised them of our deviation. Supplemental information from acn 242271: ATC advised us of traffic 5 mi south of us climbing VFR through our altitude. We had our TCASII on 5 mi range and had him at our 3 O'clock position and closing. As we leveled at 13000 ft the TCASII signal went from white to yellow, then red on the screen. At -4 red we got a full red circle on our worm and an aural 'climb, climb' at the 200 ft difference. The signal was approaching our inner circle. I punched the autoplt off, pulled the aircraft into a 15-17 degree nose up attitude with a 25 degree left bank away from the traffic.

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Original NASA ASRS Text

Title: ACR X TCASII TA RA WITH VFR SMT EVASIVE ACTION TAKEN CLB AND TURN. SEE AND AVOID CONCEPT.

Narrative: I WAS FLYING ACR X ON VNAV AND LNAV DSNDING AND LEVELING OFF AT 13000 FT. WE WERE 20 MI W OF CLOVIS. I HAD THE VNAV PROGRAMMED FOR 20 W AT 10000 FT AND 250 KTS. I WAS CALCULATING MY ARR BECAUSE CTR WAS KEEPING ME SLIGHTLY HIGH. ZOA TOLD THE SMT TO LEVEL AT 12500 FT BECAUSE OF A TFC CONFLICT. I WAS LOOKING OUTSIDE, BELOW, AND TO THE R BECAUSE I KNEW WE WOULD BE GOING 500 FT ABOVE HIM. TCASII SHOWED: WHITE THEN YELLOW, BELOW AND TO THE R, BUT STILL CLBING. ALMOST IMMEDIATELY, TCASII WENT RED WITH AURAL WARNING 'CLB, CLB.' THE CAPT, WHO WAS MONITORING TCASII, DISENGAGED THE AUTOPLT AND CLBED TO THE L. TCASII SAID CLB AT 4000 FPM. THE SMT PASSED TO THE R ABOUT 200 FT BELOW AND 1/2 - 1 MI AWAY. CTR GAVE US NO INSTRUCTIONS UNTIL WE ADVISED THEM OF OUR DEV. SUPPLEMENTAL INFORMATION FROM ACN 242271: ATC ADVISED US OF TFC 5 MI S OF US CLBING VFR THROUGH OUR ALT. WE HAD OUR TCASII ON 5 MI RANGE AND HAD HIM AT OUR 3 O'CLOCK POS AND CLOSING. AS WE LEVELED AT 13000 FT THE TCASII SIGNAL WENT FROM WHITE TO YELLOW, THEN RED ON THE SCREEN. AT -4 RED WE GOT A FULL RED CIRCLE ON OUR WORM AND AN AURAL 'CLB, CLB' AT THE 200 FT DIFFERENCE. THE SIGNAL WAS APCHING OUR INNER CIRCLE. I PUNCHED THE AUTOPLT OFF, PULLED THE ACFT INTO A 15-17 DEG NOSE UP ATTITUDE WITH A 25 DEG L BANK AWAY FROM THE TFC.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.